Lunch box



FIG. 1 is a front, left, top perspective view of a lunch box showing mynew design;

FIG. 2 is a back, left, bottom perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a back view thereof;

FIG. 5 is a left view thereof;

FIG. 6 is a right view thereof;

FIG. 7 is a top view thereof;

FIG. 8 is a bottom view thereof; and,

FIG. 9 is a front, left, top perspective view thereof shown in acondition of use.

The broken lines shown on the drawings depict portions of the lunch boxthat form no part of the claimed design.

CLAIM The ornamental design for a lunch box, as shown and described.